Pencil-sharpener.



L. B. CHADWICK.

PENCIL SHARPBNER.

` APPLICATION FILED 1330.5, 1910. 1,079,312. Patented N0v.18,1913.

mvg x' LEONARD.A B. CHADWICK, .0F.. .CHETJSE.A., MASSACHUSETTS,,ASSJLGNltl T0: GENERAL., SUPPLIES :COMIANJR OEBQSTON.. MSSAQHILSEETSMCORPQEAWIQN(V GEWA CHUSETTSL,

PENCIL-SHARPENEBT Specification .on Letters Patent` PatentedNowlS,1913..

Be iitknown that--I,-'l LEON-ARD 13.i Orten? wien; a citizen AoftheUnited .Statesyresil thereo-to ceasew A11 device ioftthsiss..` genera-lnature is shown in my--focmelsPatontwNot 894;600,HJuly-:28, 1909;.andithenpresent. inventionistiintht-naturewo 'an improvement onI said zpatented device.. In f saidt patented device a motor. visl employedifor.' openatin thef Sharpener yand. fthisA motor-.f is;l connectedirectly to and rotates -a spindle 'L which in turn:l calificar-ta,-`cuttyeI-,` andi-mean@l are l provided vwhereby the cutter-i 4is .lrotated.' by or through movement of the spindle; The pat+ ented devicealso i employs'. means for. Vantomaticallynclosingf the fcircuit c. ofi1 the motor when a pencil is'l inserted-into the devicewherebyfftheaapparatus 'wil-l bemin operation so longvvastheipencil is\inserted therein.'

The presentfinventinyisinf the nature of an ini rovement 'on thispatented "devi-ce and theao jfe'ctsrof the: invention .is to a.simplifythe. construction.: thereof and thereby cheapenf thefcostofmanufacture;` to me vide'a .device .wherein the cutter isi-drivendirectly..- by fthe motor :while the spindle. is drivemindirectlythiereby-g Vand to otherwise improve {ther-device; all as willz be moreAfully hereinafter 'described-f and then pointed outinfthefiappended-claims;

Referring mow to the. drawingsy Iwherein vI have-:illustrated apreferredembodiment of mywinventipng; Fi u-I-'e -1 is afviewpartlyi-insideltelevation an partly fin vertical ,sect-ion showing fa :mach-ine:made in accordance with theunvention; Fig. 2 1s asection on the linewww Figi: 1 Fig.` 3 ris. a :section onzthe :line

lsfnnellef with i thetcutter" sustained-1 'thereb' 5 Eig. I5istwplanlviewothe 'contacts for-|t motori circuit;v Figi (i1-shows:howthw may tbe: sharpened with :my-'improvedetico to give a.liatconchisel point:

eil-

a. Tledevfice eskhereinshownfisainclosedlin y 'ya .sniteble casingand'fit inclndesda vmotor indicated :m4 :which mayboot any suitable oryusual constructionfthe armature -shaiftE of which-isishown att-5. Thecasing isprovidediWi-thmn interior bearing-6 inwhich -isrotatablyimounteda cutter-.carrier or spin dle=7 which-isfprovi-dedwithin conicalw enf Filareceiving 'clair/lieber:l ort recess 8 andw lichsust-a1nsthe|cutter9 thatfmaybe of any suit able' Kor usualconertruction..n The cntter-f9 lis situatedecoentricallyofthe spindle:and 'at amangletasy usual in' this-class off'devices;and'whenthevdewice-is in opera-tion and =the end of a pencil is insertedinto the chamber 9, 'theotatiomofthe spindlelcarries1thecutteraboutf-thepencil .andA the rotation rof: the cutten a-boutfitsowmaxis operates ,toShar en the .pencl;.. all as Lusualfsin :devicesnoftt ls classed i Invmpresenbinvent-ion-Lconnectthecuti ter\9='d1ectlyto t the motor shaftl =5so 1. that thet'cutter lis driven positively.v ,and directly by-saidlfrnotory and-I iprovide'- earing--betweenftheusha-fb 5 and thespindle 7 'for rotatin-g?Mythe'--spindlet- (nutten 9 is-rotatablyvmounted upon a beanA ingtmember'for lsupportfflO which 'isin\ the tforrrrlofzfa tube -fixedlyi carried-.by vthe spindle= 7and'isituated eccentrioally thereof and at the desired= angle. Thecutter`9 is -prm vided-with l an interior bore ior- -recess which fitscver thebea-ring'lO;y Themotorsha-t Idis-provided witha flexible extension 11which passes thr(l ughYi an inclined aperture Aswherein shown the l12-forrnecl-4 in tli'espindle-7 and'eX-tends I through thebearing-10,'theiend-l ofthe shaft -j extension 1 1 extending :into the cutter -9'andbeing secured the-retozinv-anyi-suitable way. sothatwotation:of-'theshfaft/1e):`l

tensionsull will 'give rotation-to .the cutter mtted :directly-Lto the;cutter 'without 'any diii'iculty. For rotating the spindle 7 I. haveprovided said spindle with the head 14 'having the internal gear teeth15 which mesh with an idler 16 carried'by a fixed support 17 and whichin turn meshes .with and is driven by a gear` 18 on the motor shaft 5.With this construction, the rotation of the gear 18 will give rotationto the intermediate gear 16, and the latter will rotate the gear 15, andthus rotate the spindle 7, but because of the fact that the gear 15 isconsiderably larger than the gear 18 the spindle will rotate at asomewhat slower speed than the motor shaft and cutter do.

The casing 3 is provided with an opening 19 in one end thereof throughwhich the pencil 2O is inserted, as seen in Fig. l, said opening beingso positioned that the end of the pencil when inserted will enter thepencilreceiving recess 8. The device herein shown comprises means forclosing the motor circuit, which means are operated lby the pencil whenthe latter is inserted through the opening 19. In the embodiment of theinvention illustrated, the motor circuit is. shown partially in diagramat 21, although I have not deemed' it necessary to show the connectionsbetween said circuit and the motor, as these may be of any suitableconstruction. Said motor circuit includes two contact members 22 and 23which are normally insulated from each other and which may beconveniently sustained byl a block 24: of insulating material.

25 and 26 designate two jaws which are pivoted to the casing at 27 and28, respectively, and which are situated to be engaged by the pencil asthe latter is forced through the aperture 19. Each jaw is connected by alink 29 with a collar 30 which is mounted to turn about a boss orsupport 31 formed on the casing, and this collar has fast thereto an arm32, preferably of insulating material, which is adapted to engage thecontact 23. The jaws normally occupy the position shown in Fig. 2, butwhen a pencil is inserted between them they are spread apart therebyturning the collar 30 and swinging the arm 32 into a position to closethe contacts 22 and 23 against each other thereby closing the motorcircuit and starting up the motor. So long as a pencil is held in theaperture 19, the motor circuit will be closed and the motor will beoperated to drive the pencil Sharpener, but as soon as the pencil iswithdrawn, the resiliency of the contacts 22 and 23 will spread themapart, thus opening the motor circuit, and bring the jaws back to theirnormal position shown in Fig. 2.

33 designates a chip receptacle or pan in which the chips are received.Said receptacle is slidably supported on ways 34. so that it can bereadily Withdrawn to empty out the refuse therein.

35 designates an oil well leading to the spindle 7 and by which saidspindle may be oiled in its bearing.

It will be seen that the device herein shown is very simple in itsconstruction and can be cheaply manufactured. Another advantage is thatIthe cutter which is the rapidly-movin part' is operated directly fromthe motor s aft, and the only gearing necessary is the reducing gearingrequired between the motor shaft and the spindle. In

my former patent two sets of gearing Were necessary, one connecting themotor shaft of the spindle and the other connecting the spindle with thecutter. Another advantage of the present construction is that by meansof it, it is possible to sharpen a pencil with a chisel point, such asdraftsman are wont to use. This can be done by first depressing the endof the pencil after it has been inserted into position to be cut,` andthen elevating the end. The result will be that the pencil will besharpened in the manner shown in Fig. 6, thus giving the desired chiselpoint.

I would add that the invention is not limited to the constructionaldetails illustrated, and that various changes in the parts might be madewithout departing from the invention.

Having fully described my invention, what I claim as new and desire tosecure by Letters -latent is 1. In a pencilsharpener, the combinationwith a rotary spindle having a conical pencil-receiving recess, of acutter carried thereby and rotatable independently of and with thespindle, a driving element connected to the cutter to rotate the latter,and connections between the driving means for the cutter and the spindleto rotate the latter from the former.

2. In a pencil Sharpener, the combination with a spindle having apencil-receiving recess, of a cutter sustained by the spindle androtatable therewith, a motor connected directly to the cutter to rotatethe latter independently of the spindle, and means to rotate thespindle.

3. In a pencil sharpener, the combination with a spindle having apencil-receiving recess, of a cutter sustained by the spindle androtatable therewith, a motor connected directly to the cutter to rotatethe latter independent-ly of the spindle, and means operated by themotor to rotate the. spindle.

'4. In a pencil Sharpener, the combination with a rotary spindle havinga conical pencil-receiving portion, of a cutter rotatably carried by thespindle, a motor, a iiexible shaft connecting said motor and the cutterwhereby the cutter is rotated directly from the motor, and means torotate the spindle.

5. In a pencil Sharpener, the combination with .a rotary spindle havinga conical pencil-receiving recess, ota cutter rotatably carried b the sindle, a motor having a shaft name to this provi ed wit connecteddirectly to the cutter cutter is rotated directly dle to rotate thelatter.

In testimony whereof, I have signed my a iexible extensl specification,in the presence of which is two subscribing witnesses. whereby theLEONARD B. CHADWICK.

Witnesses:

LoUIs C. SMITH, THOMAS J. DRUMMOND.

by the motor, and 5 gearing between said motor shaft and spin-

